master cylinder identify

[N242]

hey
i have mustang 67 a code whit booster, front disks brakes 4 piston and rear drum
my master cylinder looks like this :
View attachment 303903
tomorrow i will be upload a real pic /
i have the latter CL 15 on the master cylinder , in the first piston i have this part no : magner lockheed fd 75933.

this is original master cilinder ?
this fit to my system ?

i have another 2 more master cylinder (1 big hole and 1 small holl) how can i know if tham for disk braks .
how can i know what is the car they come frome

thanks

 

[RagHead]

The master cylinder you show in the photo is for a drum/drum system . One for a disc/drum system will have one large chamber and one small. The larger chanber (closes to the firewall) is for the front (disc) brake and the smaller is for the rear (drum). There is also a disc/disc master with equal size chanbers.